Bug#979177: cups-filters-core-drivers: Adding a printer impossible because "driverless" is too slow
I have released cups-filters 1.28.7 with the fix now. https://github.com/OpenPrinting/cups-filters/releases/tag/1.28.7
Bug#979177: cups-filters-core-drivers: Adding a printer impossible because "driverless" is too slow
I have investigated the problem further and the problem is caused by "driverless" sending get-printer-attributes IPP requests to each printer it lists, to check the quality of driverless printing support. See https://github.com/OpenPrinting/cups-filters/pull/235 This makes "driverless" taking too long time, especially if there are many printers. See the investigations on https://github.com/OpenPrinting/cups/issues/65 Therefore I have removed the feature again now, on both master and 1.x branches of cups-filters: https://github.com/OpenPrinting/cups-filters/commit/3fddcf5 https://github.com/OpenPrinting/cups-filters/commit/aae86d2 Please test, this should solve your problem. I will release cups-filter 1.28.7 soon, with this change included.
Bug#979177: cups-filters-core-drivers: Adding a printer impossible because "driverless" is too slow
The problem also got reported upstream: https://github.com/OpenPrinting/cups/issues/65 Could you also see the discussion there and try what got suggested there? I by myself am not able to reproduce it, so I need someone who can reproduce it to find out under which conditions it happens. Till
Bug#979177: cups-filters-core-drivers: Adding a printer impossible because "driverless" is too slow
Any progress on this issue, Shai? Cheers, Brian.
Bug#979177: cups-filters-core-drivers: Adding a printer impossible because "driverless" is too slow
tags 979177 moreinfo thanks On Sun 03 Jan 2021 at 23:24:10 +0200, Shai Berger wrote: > Package: cups-filters-core-drivers > Version: 1.28.6-1 > Severity: normal > > Dear Maintainer, > > I've seen some misbehavior from my printer, and tried to remove and add it > back again. This failed, with the symptoms described in > https://unix.stackexchange.com/questions/276736/cups-adding-printer-fails-with-unable-to-get-list-of-printer-drivers-success > that is, no matter what interface I use -- KDE, Gnome or the web > via localhost:631 -- I get the same error when trying to find > drivers for the printer: > > Unable to get list of printer drivers: > Success > > Following the advice on that page, I tried to see if removal of > one of the files in /usr/lib/cups/driver can help me get faster > results, and I found that the guilty script was > /usr/lib/cups/driver/driverless Thank you for your report, Shai. How do you go on with 'lpinfo -m' when * /usr/lib/cups/driver/ contents are as normal? * /usr/lib/cups/driver/ contains only driverless? > I then tried to run this script in isolation, and got: > > $ time /usr/lib/cups/driver/disabl/driverless list > DEBUG: Started ippfind (PID 19070) > Failed to get info about driverless support. > "driverless:ipp://HP%20OfficeJet%206950%20%5B00A23E%5D%20(USB)._ipp._tcp.local/" > en "HP" "HP OfficeJet 6950, driverless - cannot check driverless status, > cups-filters 1.28.6" "MFG:HP;MDL:OfficeJet > 6950;CMD:PCLM,PCL,PWGRaster,AppleRaster,JPEG,URF,PWG;" > "driverless-fax:ipp://HP%20OfficeJet%206950%20%5B00A23E%5D%20(USB)._ipp._tcp.local/" > en "HP" "HP OfficeJet 6950, Fax, driverless - cannot check driverless > status, cups-filters 1.28.6" "MFG:HP;MDL:OfficeJet > 6950;CMD:PCLM,PCL,PWGRaster,AppleRaster,JPEG,URF,PWG;" > DEBUG: ippfind (PID 19070) exited with no errors. > > real3m1.817s > user0m0.005s > sys 0m0.015s I get a similar real time and output to you but without "Failed to get info about driverless support." and "cannot check driverless status,". It would seem your device failed to respond to any requests for the IPP versions available. This is a check for which type of driverless support is available. The absence of the information does not appear to be a show stopper as a URI (ipp://...) is still obtained. > Noticing my specific printer named in the output -- could it be > that the script tries to communicate with it, but fails to do it > in a robust way? It doesn't look like it. The driverless output seems reasonable to me. Please give the outputs of systemctl list-units "ipp-usb*" | grep service and lpstat -t Regards, Brian.
Bug#979177: cups-filters-core-drivers: Adding a printer impossible because "driverless" is too slow
Package: cups-filters-core-drivers Version: 1.28.6-1 Severity: normal Dear Maintainer, I've seen some misbehavior from my printer, and tried to remove and add it back again. This failed, with the symptoms described in https://unix.stackexchange.com/questions/276736/cups-adding-printer-fails-with-unable-to-get-list-of-printer-drivers-success that is, no matter what interface I use -- KDE, Gnome or the web via localhost:631 -- I get the same error when trying to find drivers for the printer: Unable to get list of printer drivers: Success Following the advice on that page, I tried to see if removal of one of the files in /usr/lib/cups/driver can help me get faster results, and I found that the guilty script was /usr/lib/cups/driver/driverless I then tried to run this script in isolation, and got: $ time /usr/lib/cups/driver/disabl/driverless list DEBUG: Started ippfind (PID 19070) Failed to get info about driverless support. "driverless:ipp://HP%20OfficeJet%206950%20%5B00A23E%5D%20(USB)._ipp._tcp.local/" en "HP" "HP OfficeJet 6950, driverless - cannot check driverless status, cups-filters 1.28.6" "MFG:HP;MDL:OfficeJet 6950;CMD:PCLM,PCL,PWGRaster,AppleRaster,JPEG,URF,PWG;" "driverless-fax:ipp://HP%20OfficeJet%206950%20%5B00A23E%5D%20(USB)._ipp._tcp.local/" en "HP" "HP OfficeJet 6950, Fax, driverless - cannot check driverless status, cups-filters 1.28.6" "MFG:HP;MDL:OfficeJet 6950;CMD:PCLM,PCL,PWGRaster,AppleRaster,JPEG,URF,PWG;" DEBUG: ippfind (PID 19070) exited with no errors. real3m1.817s user0m0.005s sys 0m0.015s Noticing my specific printer named in the output -- could it be that the script tries to communicate with it, but fails to do it in a robust way? -- System Information: Debian Release: bullseye/sid APT prefers testing APT policy: (990, 'testing'), (800, 'unstable'), (800, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 5.9.0-5-amd64 (SMP w/4 CPU threads) Locale: LANG=en_IL.UTF-8, LC_CTYPE=en_IL.UTF-8 (charmap=UTF-8), LANGUAGE=en_US Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages cups-filters-core-drivers depends on: ii bc 1.07.1-2+b2 ii cups-ipp-utils 2.3.3op1-3 ii libc6 2.31-6 ii libcups2 2.3.3op1-3 ii libcupsfilters11.28.6-1 ii libgcc-s1 10.2.1-3 ii liblcms2-2 2.9-4+b1 ii libpoppler-cpp0v5 20.09.0-3 ii libqpdf28 10.0.4-1 ii libstdc++6 10.2.1-3 ii poppler-utils 20.09.0-3 ii zlib1g 1:1.2.11.dfsg-2 cups-filters-core-drivers recommends no packages. cups-filters-core-drivers suggests no packages. -- no debconf information
